frank

The word originated in southeast Melbourne years ago and seems to have spread Australia-wide in a matter of years. There is a suburb named Frankston in Melbourne, the word was first used by a small group of individuals who had a dislike for a group of individuals from Frankston. So if you were trying to offend your mate, you would call him frank, or if you saw something dumb, retarded, etc you would call it frank.

*Friend does something retarded*
"That was frank"